Hydrogen peroxide increases potato tuber and stem starch content, stem diameter, and stem lignin content

2005 ◽  
Vol 82 (4) ◽  
pp. 279-285 ◽  
Author(s):  
H. López-Delgado ◽  
H. A. Zavaleta-Mancera ◽  
M. E. Mora-Herrera ◽  
M. Vázquez-Rivera ◽  
F. X. Flores-Gutiérrez ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Potato Tuber ◽  
Lignin Content ◽  
Starch Content ◽  
Stem Diameter ◽  
Stem Lignin

scholarly journals Continuous Blown Film Preparation of High Starch Content Composite Films with High Ultraviolet Aging Resistance and Excellent Mechanical Properties

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3813
Author(s):  
Bowen Lin ◽  
Chengqiang Li ◽  
Fangping Chen ◽  
Changsheng Liu
Keyword(s):  
Mechanical Properties ◽  
Lignin Content ◽  
Starch Content ◽  
Composite Films ◽  
Oh Groups ◽  
Longitudinal Tensile Strength ◽  
High Starch Content ◽  
Aging Resistance ◽  
High Starch ◽  
Ultraviolet Aging

Starch/PBAT blown films with high ultraviolet aging resistance and excellent mechanical properties were prepared by introducing lignin with polyurethane prepolymer (PUP) as a starch modifier and physical compatibilizer and 4,4′–methylene diphenyl diisocyanate (MDI) as a crosslinker. Starch was modified by reacting the NCO groups of the PUP with the OH groups of the starch to form a carbamate bond. The mechanical properties, hydrophobic properties, ultraviolet barrier, ultraviolet aging properties and microscopic morphology of starch/PBAT films with different contents of lignin were investigated. The results showed that the starch/PBAT films were blown continuously. The addition of lignin did not decrease the mechanical properties. On the contrary, the film with 1% lignin possessed the excellent mechanical properties with longitudinal tensile strength of 15.87 MPa and the elongation at a break of 602.21%. In addition, the higher the lignin content, the better the UV blocking effect. The introduction of lignin did not affect the crystalline properties but improved the hydrophilic properties and sealing strength of the high starch content composite films.

scholarly journals QTLs for potato tuber resistance toDickeya solaniare located on chromosomes II and IV

2021 ◽  
Author(s):  
Renata Lebecka ◽  
Jadwiga Śliwka ◽  
Anna Grupa-Urbańska ◽  
Katarzyna Szajko ◽  
Waldemar Marczewski
Keyword(s):  
Potato Tuber ◽  
Disease Severity ◽  
Starch Content ◽  
Disease Incidence ◽  
Soft Rot ◽  
Bacterial Disease ◽  
Phenotypic Variance ◽  
Tuber Resistance ◽  
Dickeya Solani ◽  
The Relationship

AbstractSoft rot is a bacterial disease that causes heavy losses in potato production worldwide. The goal of this study was to identify quantitative trait loci (QTLs) for potato tuber resistance to bacteriumDickeya solaniand for tuber starch content to study the relationship between these traits. A highly resistant diploid hybrid of potato was crossed with a susceptible hybrid to generate the F1 mapping population. Tubers that were wound-inoculated with bacteria were evaluated for disease severity expressed as the mean weight of rotted tubers, and disease incidence measured as the proportion of rotten tubers. Diversity array technology (DArTseq™) was used for genetic map construction and QTLs analysis. The most prominent QTLs for disease severity and incidence were identified in overlapping regions on potato chromosome IV and explained 22.4% and 22.9% of the phenotypic variance, respectively. The second QTL for disease severity was mapped to chromosome II and explained 16.5% of the variance. QTLs for starch content were detected on chromosomes III, V, VI, VII, VIII, IX, XI, and XII in regions different than the QTLs for soft rot resistance. Two strong and reproducible QTLs for resistance toDickeya solanion potato chromosomes IV and II might be useful for further study of candidate genes and marker development in potato breeding programs. The relationship between tuber resistance to bacteria and the starch content in potato tubers was not confirmed by QTL mapping, which makes the selection of genotypes highly resistant to soft rot with a desirable starch content feasible.

scholarly journals PEMBUATAN PULP DENGAN MEMANFAATKAN LIMBAH KULIT DURIAN (DURIO ZIBETHINUS MURR) DENGAN CAMPURAN (RESINA COLOPHONIUM) GUNA MENCEGAH DEGRADASI LINGKUNGAN

2015 ◽  
Vol 17 (3) ◽  
Author(s):  
Deddy Kurniawan W Kurniawan W ◽  
Fahmi Arifan ◽  
M. Dwi Khoirun Adim
Keyword(s):  
Lignin Content ◽  
Starch Content ◽  
Thick Wall ◽  
Cellulose Content ◽  
Durio Zibethinus ◽  
A Value ◽  
Yield Value ◽  
Term Basis ◽  
High Cellulose

Deddy Kurniawan W, Fahmi Arifan, M. Dwi Khoirun Adim, in this article explain that paper is one of the primary needs for humans today . High paper usage is resulting increased in production of paper . On the other hand, paper which are usually made ​​from cellulose and hemi-cellulose in wood can result environmental degradation , due to the use of wood and tree felling leads to long-term basis that can increase the temperature of the earth surface ( global warming) . Durian is relatively abundant in Indonesia , durian shell contains high cellulose ( 50-60 % ) and lignin content ( 5 %), also  a low starch content ( 5 % ) . Durian shell wastes containing fibre  with dimensions of length and fiber thick wall that be able to bind well when given a synthetic adhesive or an adhesive mineral . Pulp which is produced from durian shell waste in experiments were 1 , 2 , 3 and 4, have a value of α - cellulose content of 35 % , 45 % , 27.7 % , 37.5 % and 57.6 %, respectively. When yield value of  49.2 % , 66.8 % and 48.2 % respectively. Keywords: pulp, durian, gondorukem, digester

scholarly journals Jute (Corchorus olitorius var. O-72) stem lignin: variation in content with age

2015 ◽  
Vol 43 (3) ◽  
pp. 309-314 ◽  
Author(s):  
AM Tanmoy ◽  
MA Alum ◽  
MS Islam ◽  
T Farzana ◽  
H Khan
Keyword(s):  
Deposition Rate ◽  
Lignin Content ◽  
Average Rate ◽  
Reference Value ◽  
Dry Mass ◽  
Corchorus Olitorius ◽  
Rate Of Increase ◽  
Different Ages ◽  
Stem Lignin

Stem lignin content of a mature jute plant was found to be around 29% giving a deposition rate of 0.21% per day. The study was made on individual plants of different ages starting from five weeks when they were big enough to produce sufficient dry mass for lignin estimation to 16 weeks of age when a jute plant is ready for retting. An intense rate of increase (1.15%) was found during the 7th week of growth, probably due to a rise in temperature. Present data and the average rate of increase of lignin production can be considered as a reference value for projects working on producing low-lignin - jute varieties. DOI: http://dx.doi.org/10.3329/bjb.v43i3.21603 Bangladesh J. Bot. 43(3): 309-314, 2014 (December)

Analysis of quantitative trait loci (QTLs) and quantitative trait alleles (QTAs) for potato tuber yield and starch content

1998 ◽  
Vol 97 (5-6) ◽  
pp. 834-846 ◽  
Author(s):  
R. Schäfer-Pregl ◽  
E. Ritter ◽  
L. Concilio ◽  
J. Hesselbach ◽  
L. Lovatti ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Potato Tuber ◽  
Quantitative Trait ◽  
Tuber Yield ◽  
Starch Content ◽  
Trait Loci

Methods to increase the starch content of potato tuber callus tissue

1993 ◽  
Vol 36 (4) ◽  
pp. 293-299 ◽  
Author(s):  
Steven R. Hagen ◽  
Steven Harrison ◽  
Paul Muneta ◽  
Duane Letourneau
Keyword(s):  
Potato Tuber ◽  
Callus Tissue ◽  
Starch Content

RELATIONSHIP BETWEEN STEM DIAMETER AND IN VITRO DIGESTIBILITY OF FORAGES

1967 ◽  
Vol 47 (4) ◽  
pp. 423-426 ◽  
Author(s):  
D. N. Mowat ◽  
R. S. Fulkerson ◽  
E. E. Gamble
Keyword(s):  
Dry Matter ◽  
Lignin Content ◽  
Stem Diameter ◽  
In Vitro Digestibility ◽  
Acid Detergent Fiber ◽  
Stem Size ◽  
The Third ◽  
Dry Matter Digestibility ◽  
Flower Stage

Stem diameter of Vernal alfalfa was markedly greater from first cut than from aftermaths, particularly the third cut. Stems were larger from clump than from solid spacings within rows. Only the narrowest row widths tended to influence stem size. When alfalfa was cut at the first-flower stage, stem diameter had no effect on in vitro dry matter digestibility. Furthermore, stem width had no influence on the digestibility of various bromegrass entries cut at the heads-elongated stage. No consistent relationship occurred between stem width and lignin or acid-detergent fiber content with alfalfa. However, the narrow stems of bromegrass had a slightly higher lignin content.

scholarly journals Enzymatic hydrolysis of carbohydrates in by-products of processed rice

2021 ◽  
Vol 51 (11) ◽  
Author(s):  
Camila da Silva Turini ◽  
Roberta Martins Nogueira ◽  
Evaldo Martins Pires ◽  
Juliana da Silva Agostini
Keyword(s):  
Enzymatic Hydrolysis ◽  
Ethanol Production ◽  
Lignin Content ◽  
Starch Content ◽  
Paddy Rice ◽  
Amylolytic Enzymes ◽  
Production Chain ◽  
Type Iii ◽  
Pre Treatment ◽  
By Products

ABSTRACT: Over post-harvest steps of rice, from pre-cleaning to processing, a large amount of by-product is generated. Some of these by-products, due to their high starch and fiber content can be used in ethanol production. The objective was to evaluate the effect of enzymatic hydrolysis conditions on the production of reducing sugars, from pre-cleaning residue and type III paddy rice, as well as the effect of the pre-treatment of its fibers, targeting the use of these residues in ethanol fuel production. The proximate analysis was performed, followed by the pre-treatment of samples. Enzymatic hydrolysis was conducted in two ways: using one enzyme at a time or applying them simultaneously. The starch content was 41.18 and 53.41%; the fibers were 30.44 and 23.39%, of which 6.53 and 4.41% were lignin, for the pre-cleaning residue and paddy rice, respectively. Alkaline pre-treatment reduce lignin content by 47.94 and 18.23% for the pre-cleaning residue and type III paddy rice, respectively. Hydrolysis efficiency was 22.61 and 15.32% for the cellulase enzyme, and 82.18 and 87.07% for the amylolytic enzymes in the pre-cleaning residue and type III paddy rice, respectively. The hydrolysis with the separated enzymes presented higher reducing sugar yields. Therefore, the pre-cleaning residue and type III paddy rice can be used for ethanol production by its enzymatic hydrolysis, aiming to add value and to increase the sustainability of the rice production chain.

scholarly journals The PMT-driven p-coumaroylation of poplar lignins impacts lignin structure and improves wood saccharification

2021 ◽  
Author(s):  
Catherine Lapierre ◽  
Richard Sibout ◽  
Françoise Laurans ◽  
Marie-Claude Lesage-Descauses ◽  
Annabelle Déjardin ◽  
...  
Keyword(s):  
Lignin Content ◽  
Brachypodium Distachyon ◽  
Industrial Processing ◽  
Promising Strategy ◽  
Transgenic Lines ◽  
Naoh Solution ◽  
In The Wild ◽  
C3 Grasses ◽  
Poplar Growth ◽  
Stem Lignin

ABSTRACTTransgenic poplars (Populus tremula x Populus alba, clone INRA 717-1B4) were produced by introducing the Brachypodium distachyon Bradi2g36910 (BdPMT1) gene driven by the Arabidopsis (Arabidopsis thaliana) Cinnamate 4-Hydroxylase (AtC4H) promoter in the wild-type (WT) line and in a line overexpressing the Arabidopsis Ferulate 5-Hydroxylase (AtF5H). BdPMT1 encodes a transferase which catalyzes the acylation of monolignols by p-coumaric acid (CA). Several BdPMT1- OE/WT and BdPMT1-OE/AtF5H-OE transgenic lines were grown in the greenhouse and BdPMT1 expression in xylem was confirmed by RT-PCR. The analysis of the cell walls (CW) of poplar stems and of corresponding purified dioxan lignins (DL) revealed that the BdPMT1-OE lignins were as p-coumaroylated as the lignins of C3 grass straws. For some transformants, CA levels even reached about 11 mg/g CW and 66 mg/g DL, which by far exceeds those of Brachypodium or wheat samples. This unprecedentedly high p-coumaroylation of poplar lignins affected neither the poplar growth, nor the stem lignin content. By contrast, the transgenic lignins were structurally modified, with an increase of terminal units with free phenolic groups. Relative to controls, this increase argues for a reduced polymerization degree of BdPMT1-OE lignins and makes them more soluble in cold NaOH solution. The p-coumaroylation of poplar samples, up to the levels of C3 grasses, improved the saccharification yield of alkali-pretreated poplar CW. These results establish that the genetically-driven p-coumaroylation of lignins is a promising strategy to make wood lignins more susceptible to the alkaline treatments that can be used during the industrial processing of lignocellulosics.One-sentence summaryThe expression of a grass p-coumaroyl-CoA:monolignol transferase induces a high p-coumaroylation of poplar lignins and a better saccharification of alkali-pretreated poplar wood without growth penalty

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